[GE] GE MVP ICOM questions

[Cboone@earthlink.net]

ICOMs?? As in the MII ICOMs or the MVP open xtal elements??? 

The 2C ICOM can be used on both TX and RX of the MVP IF YOU wish..
it was required in the MVP for base/control station use under Part
90 and 95..the rcvr was stable enough....The standard elements are 5ppm.
You DO need the adaptor board which allows the ICOMs to be plugged
in and then it connects to there the open elements would go..

High side vs low side....you can use any ICOM/element you wish as
long as the xtal works in it...there are NO tuned elements in either
one..

On UHF radios, I have installed the xtals myself...but if you feel
unsure about that yourself, send the ICOMs to ICM or whoever you buy
xtals from...The open elements are easy to do yourself..BUT I never
have any problem either way with the ICOMs..

BUT in your temp range, I would definitely use the ICOMs on BOTH TX
and RX and have the factory put the xtals in and align the elements..
Also NOTE if you donot use the ICOMs, the temp compensate line
on the exciter WILL pull the rcvr xtal off freq in rptr mode...
With the 2C elements ONLY, there is no problem....If you use the 
5C ICOM or the std xtal elements, you WILL have the problem unless
you modify the rcvr for a FIXED 3.9V DC into the element...
I always do that for MVPs..

Chris
WB5ITT

"Thomas L. Staley Jr." wrote:
> 
> Hello All,
> 
>     I have a few questions about MVP ICOMs.  I have searched but not
> found a list of ICOM numbers for any band but UHF, is there a list for
> the other bands that I have missed?
> 
> I am interested in the 2ppm  versions.  I appears that this would apply
> only to the TX side?
> 
> I an also interested in high side injection vs the normal low side
> injection.  I see that there are different ICOM part numbers for this.
> Is there any real difference? i.e. can I use a low side injection ICOM
> in a high side application?
> 
> In other words, how interchangeable are the various  MVP ICOMs?
> 
> Would buying the crystals and me tuning the ICOM vs having the whole
> thing sent out be the way to go?  I'm new to this without much RF
> equipment.  The machine will need to operate in a temperature range from
> 
> about -10 to 110 degrees F.
> 
> Thanks,
> Tom N8LBT
>